Vertex got burned so badly when they bungled the release of phase 2 VX-809 data last May that I think they were not going touch Terrence Flynn's question regarding interim phase 2 VX-661 data with a 10 foot pole. Even if the data is fantastic.
You're suggesting that because they screwed up the vx-809 data, that they won't release anymore interim data for fear they'll screw it up again. And you're comfortable investing money in a company run by this management team?
I think it is wise not to release interim data unless things are going so badly that the trial needs to be be halted. When a trial is going well, it is better to wait until you have the final results. before you release anything. I think Vertex management has learned this hard lesson.